Name field on the add date format, format mode and view mode pages needs a required label [#3273102] | Drupal.org
Date format (date_format) issue · Issue #662 · smarty-php/smarty · GitHub
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Since PHP 5.5.22 date_format error: Warning: date_format() expects parameter 1 to be DateTimeInterface, string given in · Issue #88 · smarty- php/smarty · GitHub
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